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CVE-2023-54081

Estado: AplazadaSin puntuar—

In the Linux kernel, the following vulnerability has been resolved:

xen: speed up grant-table reclaim

When a grant entry is still in use by the remote domain, Linux must put it on a deferred list. Normally, this list is very short, because the PV network and block protocols expect the backend to unmap the grant first. However, Qubes OS's GUI protocol is subject to the constraints of the X Window System, and as such winds up with the frontend unmapping the window first. As a result, the list can grow very large, resulting in a massive memory leak and eventual VM freeze.

To partially solve this problem, make the number of entries that the VM will attempt to free at each iteration tunable. The default is still 10, but it can be overridden via a module parameter.

Leer descripción completaMostrar menos

This is Cc: stable because (when combined with appropriate userspace changes) it fixes a severe performance and stability problem for Qubes OS users.

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

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{
  "id": "CVE-2023-54081",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "569ca5b3f94cd0b3295ec5943aa457cf4a4f6a3a",
              "lessThan": "cd1a8952ff529adc210e62306849fd6f256608c0",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "569ca5b3f94cd0b3295ec5943aa457cf4a4f6a3a",
              "lessThan": "c76d96c555895ac602c1587b001e5cf656abc371",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "569ca5b3f94cd0b3295ec5943aa457cf4a4f6a3a",
              "lessThan": "c04e9894846c663f3278a414f34416e6e45bbe68",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "Documentation/ABI/testing/sysfs-module",
            "drivers/xen/grant-table.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.5"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "3.5",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.1.43",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.4.8",
              "versionType": "semver",
              "lessThanOrEqual": "6.4.*"
            },
            {
              "status": "unaffected",
              "version": "6.5",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "Documentation/ABI/testing/sysfs-module",
            "drivers/xen/grant-table.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-12-24T13:16:09.950",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/c04e9894846c663f3278a414f34416e6e45bbe68",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c76d96c555895ac602c1587b001e5cf656abc371",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/cd1a8952ff529adc210e62306849fd6f256608c0",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxen: speed up grant-table reclaim\n\nWhen a grant entry is still in use by the remote domain, Linux must put\nit on a deferred list.  Normally, this list is very short, because\nthe PV network and block protocols expect the backend to unmap the grant\nfirst.  However, Qubes OS's GUI protocol is subject to the constraints\nof the X Window System, and as such winds up with the frontend unmapping\nthe window first.  As a result, the list can grow very large, resulting\nin a massive memory leak and eventual VM freeze.\n\nTo partially solve this problem, make the number of entries that the VM\nwill attempt to free at each iteration tunable.  The default is still\n10, but it can be overridden via a module parameter.\n\nThis is Cc: stable because (when combined with appropriate userspace\nchanges) it fixes a severe performance and stability problem for Qubes\nOS users."
    }
  ],
  "lastModified": "2026-06-17T06:46:46.197",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}